Fluoropolymer and thin organic film comprising same

Abstract

An object of the invention is to provide a fluorine-containing polymer that is superior in both stability against doping of oxygen and solubility in an organic solvent. The invention provides a fluorine-containing polymer including a structure represented by formula (I) in a repeating unit. wherein R 1 and R 2 are the same or different and each mean a hydrogen atom, a halogen atom, or a monovalent group.

1 . A fluorine-containing polymer comprising a structure represented by formula (I) in a repeating unit: 
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are the same or different and each mean a hydrogen atom or a monovalent group. 
       
     
     
         2 . The fluorine-containing polymer according to  claim 1 , further comprising a structure represented by formula (II) in the repeating unit:
   [Chemical Formula 2]     —Ar—  (II)
   wherein Ar 1  means a C6 or higher divalent aromatic hydrocarbon group or a C4 or higher divalent heterocyclic group.   
     
     
         3 . The fluorine-containing polymer according to  claim 2 , wherein Ar 1  is a group represented by formula (III): 
       
         
           
           
               
               
           
         
         wherein R 3  and R 4  are the same or different and each mean a hydrogen atom or a monovalent group; R 3  and R 4  may be bonded together to form a ring; and Z 1  means any of groups represented by formulas (i), (ii), (iii), (iv), (v), (vi), (vii), (viii) and (ix): 
       
       
         
           
           
               
               
           
         
         wherein R 5 , R 6 , R 7  and R 8  are the same or different and each mean a hydrogen atom or a monovalent group; and R 5  and R 6  may be bonded together to form a ring, and a group represented by the formula (iv) may be reversed from left to right. 
       
     
     
         4 . The fluorine-containing polymer according to  claim 3 , wherein the Z 1  is a group represented by the formula (ii). 
     
     
         5 . The fluorine-containing polymer according to  claim 1 , wherein the R 1  and the R 2  are the same or different and are each a fluorine atom, a C1 to C20 alkyl group, or a C1 to C20 fluoroalkyl group. 
     
     
         6 . An organic thin film comprising the fluorine-containing polymer according to  claim 1 . 
     
     
         7 . An organic thin film element comprising the organic thin film according to  claim 6 . 
     
     
         8 . An organic thin film transistor comprising a source electrode, a drain electrode, an organic semiconductor layer that forms a current pathway between the electrodes, and a gate electrode to control an amount of current through the current pathway,
 wherein the organic semiconductor layer comprises the organic thin film according to  claim 6 .   
     
     
         9 . An organic solar cell comprising the organic thin film according to  claim 6 . 
     
     
         10 . A photosensor comprising the organic thin film according to  claim 6 .